Embedding Quadratic Form distance |
- QFDs and other statistical distances do not allow indexes
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- Aim is to design a low distortion low-dimensional embedding
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- Matrix
in QFD allows Cholesky decomposition since is symmetric and positive definite
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![](images/img760.png) ![](images/img761.png) |
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![](images/img763.png) |
- Therefore, embedding is
![](images/img764.png)
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- Allows further dimensionality reduction as well
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